Board buffing check



Oct. 16, 1956 G. E. NEWBERRY 2,766,560

BOARD BUFFING CHECK Filed July 8, 1954 INVENTOR.

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ATTDRN EYS BOARD BUFFING CHECK George E. Newberry, Somerset, Ky.

Application July 8, 1954, Serial No. 442,055

1 Claim. (Cl. 51-78) This invention relates to bufling and polishing machines and equipment, such as where a sheet of material is positioned upon a board and rolled under a buffing wheel with a roller functioning as a fulcrum, and in particular, an improvement in buffing machines of this type wherein rotation of the roller in the direction of the bufiing wheel is controlled or retarded and wherein the roller is free to roll in the opposite direction to facilitate withdrawing the board and sheet of material from the machine.

The purpose of this invention is to provide an improvement in butting machines wherein the pull of a bufiing wheel on a sheet of material traveling on a roller and urged against the under surface of the bufling wheel is checked by dogs, such as the dogs of a shade roller, so that the necessity of the operator pulling backwardly on the sheet of material and board to counteract the pulling force of the buffing wheel is obviated.

In bufiing machines of this type where a sheet of material, placed upon a board, is positioned on a roller and held against the under surface of a bufling wheel spaced forwardly from and positioned above the roller, considerable force is required to hold the board and sheet of material so that the board will not be drawn through the machine by the force resulting from the pull of the bufling wheel. In order to obtain a high polish, it is necessary to press downwardly with force on the extended end of a sheet of material and board and the greater the force used to urge the sheet of material against the buffing wheel, the greater the pulling force of the wheel on the sheet of material. With this thought in mind, this invention contemplates check or retarding means in the roller positioned below the buffing wheel whereby the roller is not free to spin around and can rotate only at a comparatively low speed in one direction or when feeding a sheet of material through the bufling wheel.

The object of this invention is, therefore, to provide an improved bufiing machine wherein a roller upon which sheets of material are fed to a buffing wheel is controlled whereby rotation thereof in feeding materials to the bufling wheel is retarded although the roller is free to rotate in the opposite direction.

Another object of the invention is to provide means for checking the speed of a roller for feeding material to a butfing wheel in which the checking means is adapted to be incorporated in buffing machines now in use.

A further object of the invention is to provide an improved bufiing machine in which the rotation of a roller for feeding material to a buffing wheel is controlled so that work may be fed to the bufiing wheel with a slow, easy movement and may be rapidly returned in which the machine is of a simple and economical construction.

With these and other objects and advantages in view, the invention embodies a bufling machine having a buifing roller rotatably mounted in bearings on the upper ends of side walls with a feed roller rotatably mounted in the walls and in which means is provided for driving rates Patent the feed roller from the bufling wheel shaft with a slow, easy movement.

Other features and advantages of the invention will appear from the following description taken in connection with the drawings, wherein:

Figure 1 is a view showing a longitudinal section through a typical bufling machine.

Figure 2 is an end elevational view of the machine showing the feed roller control mechanism installed on one side thereof.

Figure 3 is a side elevational view showing a typical arrangement of transmission elements for slowly rotating a feed roller of a bufling machine from the shaft of the bufling roller.

Figure 4 is a detail showing a longitudinal section through one end of the feed roller showing, in particular, dogs for actuating the roller and also a worm gear for rotating the roller and shaft thereof.

Figure 5 is a cross section through the worm gear housing taken on line 55 of Figure 4 showing the worm and worm gear.

Figure 6 is a cross section taken on line 66 of Figure 4 showing the latching dogs positioned in the end of the feed roller.

Referring now to the drawings wherein like reference characters denote corresponding parts, the improved bufling machine of this invention includes a feed roller 10 carried by a shaft 11 journaled in bearings 12 and 13 on side walls 14 and 15 extended upwardly from a base 16, a worm gear 17 mounted on a sleeve 18 which is rotatably mounted on the shaft 11 and which is positioned to mesh with a worm 19 on a shaft 21}, latching dogs 2i and 22 pivotally mounted by pins 23 and 24, respectively, on a disc 25 which is also mounted on the sleeve id, a belt 26 trained over a pulley 27 on the shaft 2%, a pulley 28 on a shaft 29 of a buffing wheel 30 and idler pulleys 31 and 32, a support 33 providing a rest for a board upon which a sheet of material is placed, and a motor 34 with a belt 35 trained over pulleys 36 and 37 on the motor and boiling wheel shaft, respectively.

As illustrated in Figure 4, the roller it is mounted to rotate freely on the shaft 11 and a flange 38 extended from one end of the roller is provided with teeth or notches 39 into which the extended ends of the dogs 21 and 22 are urged by springs 39 and 40, respectively.

With the parts arranged as shown and described, the roller 10 is free to rotate in a counter-clockwise direction so that a board, as indicated by the numeral 41 with a sheet of material 42 thereon, is adapted to be withdrawn from the bufling machine, as indicated by the broken lines in Figure l and, as the board with the sheet of material thereon is moved in the opposite direction, such as in a clockwise direction as indicated by the arrows 4-3 and 44, wherein the material to be polished is fed to the bufling wheel, spinning or free rotation of the roller is prevented by the dogs 21 and 22 whereby the sheet may be fed to the buffing wheel with a slow, easy movement.

With the parts assembled as illustrated in the drawings, the rotation of the feed roller ll) is controlled by the transmission assembly illustrated particularly in Figures 2 and 3 wherein the shaft 11 of the feed roller 16 is driven from the shaft 29 of the bufiing wheel 39 through the belt 26 and pulley assembly which drives the sleeve 18 through the worm l9 and worm gear 17. By this means the roller 10 is driven slowly and evenly so that the bufiing operation may be continuous and smooth.

As illustrated in Figures 2 and 3, the shaft 29 of the buffing wheel 3% is rotatably mounted in bearings 45 and 46 on the upper ends of the side walls 14 and 15 and the bearings 12 and 13 of the shaft 11 are secured in vertically disposed slots 47 in the walls 14 and 15 with 3 bolts 48 whereby the position of the feed roller in relation to the bufiing wheel is readily adjustable.

The worm gear 17 is positioned in a housing formed with an outer section 49 and an inner section 50 and the worm 19'is positioned in extended sections 51 and 52 of the sections 49 and 50, respectively. The shaft 2!) on which the worm 19 is mounted is rotatably mounted in bearings 53 and 54 in the sections 51 and 52 and the sections of the housing are provided with flanges 55 through which bolts 56 extend for securing the sections of the housing in assembled relation.

The idler 32 is rotatably mounted on a stationary stud 57 and the idler 31 is positioned in a yoke 58 that is urged downwardly by a spring 59 to maintain tension in the belt 26. The lower end of the spring 59 is attached to a pin 60 extended from a bracket 61, as shown in Figure 2. By this means continuous take-up elements are provided whereby sufiicient tension is maintained in the belt 26 regardless of the position of the feed roller 10.

As illustrated in Figure 4, the shaft 11 on which the sleeve 18 that carries the worm gear and dog mounting disc 25 is rotatably mounted, is keyed in the section 49 of the worm gear housing with a key 62, the worm gear 17 is keyed to the sleeve 18 with a key 63 and the disc 25 is keyed to the sleeve with a key 64.

By this means the attachment may readily be applied to a bufiing machine wherein a board or sheet of material having a sheet thereon may be fed slowly and evenly to a bufling wheel so that the sheet may be polished over the entire surface and without the necessity of an operator holding back with force on the board or sheet of material.

It will be understood that modifications, within the scope of the appended claim, may be made in the design and arrangement of the parts without departing from the spirit of the invention.

What is claimed is:

In a bufi'ing machine, the combination which comprises a stand, a bufiing wheel rotatably mounted on the stand, a motor operatively connected to the bufling wheel for rotating the same, a feed roller also rotatably mounted in the stand and positioned below the buffing wheel, the axis of the feed roller being ofiset laterally from a vertical line through the axis of the bufiing wheel, a Worm gear assembly positioned at one end of the feed roller and operatively connected thereto, a belt and pulley assembly for driving the worm gear assembly by the butfing wheel, means for adjusting the position of the feed roller in relation to the bufling wheel, and means for maintaining tension in the belt of said belt and pulley assembly, said feed roller having latching dogs in one end thereof providing means for rotating the feed roller in the direction of feeding material to the bufling wheel and permitting tree rotation of the feed roller in'withdrawing material from the buthng wheel.

References Cited in the file of this patent UNITED STATES PATENTS 604,661 Johnston et al. May 24, 1898 1,777,607 Ekholm et al. Oct. 7, 1930 2,020,541 Ernst Nov. 12, 1935 

